The Omron EE-SX471 is an L-slot through-beam photoelectric sensor from the EE-SX47 series, delivering a 5 mm sensing distance with a minimum detectable object of 2 mm x 0.8 mm opaque. It runs on 5-24V DC, switches at 3 kHz, and outputs NPN Light On — a tight-fit pick for high-speed part presence on small assembly fixtures or pick-and-place nests where the gap is fixed and the target is small.
The 5 mm gap means the emitter and receiver sit across a fixed slot — no alignment, no brackets. The L-slot body and right-angle face orientation let it drop into a machined pocket or DIN-rail adapter without crowding adjacent sensors. Solder terminals keep the connection permanent once wired; no connector to vibrate loose. Switching at 3 kHz (0.17 msec response) catches parts moving past at line speed — think small caps or pins on a vibratory feeder. Output short-circuit protection is built in, so a miswire on the load side won't kill the output transistor.